| 초록 |
For the oxidation catalyst, the catalytic activity depends on the various parameters such as preparation method, precipitant agent, calcination temperature of catalyst, etc. In this study, 10 wt% CuO catalyst supported on Al-Ce mixed oxide with a molar ratio, Al/Ce = 3/7 was prepared by impregnation method and calcined in the range of 400-900oC. The characterization of the prepared catalysts was performed using XRD, N2 sorption, H2-TPR, CO-TPR, CO-IR and N2O titration to correlate with catalytic activities in the CO oxidation. Increasing the calcination temperature of CuO/Al-Ce mixed oxide catalysts reduces BET surface area, resulting in sintering and agglomeration of 3Al-7Ce oxide particles. Among the catalysts studied here, thecatalyst calcined at 600oC showed the highest catalytic activity in the CO oxidation. It could be correlated the formation of active state of CuO cluster and a large amount of surface oxygen and hydroxyl groups on catalyst. To investigate the water effect on catalytic performance, the transition response reaction was performed. |
